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Ichthyornis (meaning "fish bird", after its fish-like vertebrae) is an extinct genus of toothy seabird-like ornithuran from the late Cretaceous period of North America.Its fossil remains are known from the chalks of Alberta, Alabama, Kansas (Greenhorn Limestone), New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian through ...
Ichthyornithes is an extinct group of toothed avialan dinosaurs very closely related to the common ancestor of all modern birds.They are known from fossil remains found throughout the late Cretaceous period of North America, though only two genera, Ichthyornis and Janavis, are represented by complete enough fossils to have been named.
Ichthyornis fossils were first unearthed in the 1870s, but the new ones from Kansas and Alabama chalk deposits, reveal far more about it than once known. Ancient bird with beak and teeth blended ...
Ornithurae (meaning "bird tails" in Greek) is a natural group that includes modern birds and their very close relatives such as the ichthyornithines and the hesperornithines.
Articles related to the Ornithurae ("bird tails"), a natural group which includes the common ancestor of Ichthyornis, Hesperornis, and all modern birds as well as all other descendants of that common ancestor.
Marsh saw important evolutionary implications of this find, along with Benjamin Mudge's find of the toothed bird Ichthyornis. [17] In an 1873 paper Marsh declared that "the fortunate discovery of these interesting fossils does much to break down the old distinction between Birds and Reptiles". [16]
It would have lived alongside the more advanced seabird Ichthyornis dispar. It is one of the few known enantiornithine birds to have lived in a marine environment, along with the Australian Nanantius eos , the slightly younger Martinavis and "Ichthyornis" minusculus , which was originally misidentified as Ichthyornis based on its presence in ...
The best known of the "Odontornithes" are Hesperornis regalis, standing about 3 ft. high, the somewhat taller H. crassipes, [1] and Ichthyornis dispar. Hesperornis looked somewhat similar to a loon , while Ichthyornis was quite similar to a gull or petrel .